Determine the peak discharge for 15 minutes Unit Hydrograph if Watershed Area = 4 km2
Slope = 1.5%
Longest path = 1000 m
CN(2) = 75

Time of concentration = 1.3 hour

6.8 m3/sec

7.2 m3/sec

9.2 m3/sec

8.1 m3/sec

Estimate the change in specific internal energy au and specific enthalpy h from inlet to outlet for ethylene glycol (a liquid) flowing through each of the following devices: (a) a heat exchanger where the glycol temperature increases from 20 °c to 80 °c; (b) a pump operating at about 25 °c and increasing the glycol pressure from 100 kpa to 8 mpa.